Sofa bed



Aug. 14, 1962 c. c. ANDES 3,048,856

SOFA BED Filed June 20, 1960 5 Sheets-Sheet 1 mmvron. ueqm 6. AnaesATTORNEYS.

Aug. 14, 1962 3,048,856

C. C. ANDES SOFA BED 3 Sheets-Sheet 3 Filed June 20, 1960 INVENTOR. ua-se 6. ANDES States Uite This invention relates to a furniture structurein the nature of a combination sofa and bed and, more particularly, tosuch a structure usable either as a sofa or as a bed wherein the seatportion is movable relative to the back portion for effectingconversion.

It is frequently desirable, particularly in hotels, motels, apartmentsand the like to conserve space by having a combined sofa and bed whereina bed portion is positioned under or with a back rest member when thedevice is used as a sofa, and the bed portion moved to a position spacedfrom the back rest when used as a bed. The mattress of the bed portionshould be supported in approximately level position for sleepingcomfort, but, when used as a sofa, the resiliency and level condition ofthe mattress result in the structure failing to provide suitable supportand comfort to a seated person. Also, in moving bed portions havingcasters r glides, the floors frequently are marred and, if moved onrugs, excessive wear will result in the path of normal movement of thebed portion.

The principal objects of the present invention are to provide acombination sofa and bed structure which overcomes the disadvantagesabovementioned; to provide a convertible sofa and bed structure having arelatively stationary frame supporting the back rest and a bed portionhaving support for movement thereof without marring or excessivelywearing floors or rugs; to provide a combination sofa and bed structurewith relatively movable frame structures with movement-resistingportions to reduce possibility of unintentional displacement; to providesuch a structure wherein the bed has a main frame and an auxiliarymattress-supporting frame hingedly connected thereto for up and downmovement and operating mechanism to raise the forward portion of themattress when the bed portion is moved to sofa-forming position; toprovide such a structure wherein tilting of the mattress is effectedautomatically by moving the bed portion from bed-forming position tosofa-forming position; to provide such a structure with locking means toretain the mattress in tilted position when arranged to be utilized as asofa; to provide a combination sofa and bed wherein the bed portion ispivoted relative to the back rest frame adjacent one end with rollersand a flexible band movably supporting the other end portion on thefloor and arranged to move in an arcuate path whereby the bed portioncan be swung outwardly about the pivotal connection and from the backrest in a plane substantially parallel with the floor; and to provide acombination sofa and bed structure that is attractive, compact,economical to manufacture, easily moved and comfortable when utilizedeither as a sofa or as a bed.

Other objects and advantages of this invention will become apparent fromthe following description taken in connection with the accompanyingdrawings wherein are set forth by way of illustration and examplecertain embodiments of this invention.

FIG. 1 is a perspective view of a combination sofa and bed structure insofa position, with portions broken away to illustrate the framestructure.

FIG. 2 is a plan view of the sofa and bed frame structure.

FIG. 3 is a front elevation of the frame structure in sofa-formingposition.

FIG. 4 is a transverse sectional View through the frame structure, takenon the line 4-4, FIG. 2.

3,M8,85 fi Patented Aug. 14-, 1962 FIG. 5 is an end elevation of theframe structure in bed-forming position.

FIG. 6 is a fragmentary perspective view of the pivoted end portion ofthe bed frame and support, with the operating members in sofa-formingposition.

FIG. 7 is a fragmentary perspective view of the frame portions similarto FIG. 6 but turned to bed-forming position.

FIG. 8 is a longitudinal sectional view through a spring balance memberto aid in lifting the forward end of the auxiliary frame and mattress.

FIG. 9 is a longitudinal sectional 'view through a resilient connectionbetween auxiliary frame operating members.

Referring more in detail to the drawings:

The numeral '1 generally designates a sofa bed structure which, in theparticular embodiment illustrated, includes a bed portion 2 movablymounted relative to a back rest portion 3 whereby a back rest cushion 4is supported over a side portion of a bed mattress 5 when the structureis used as a sofa, as illustrated in FIG. 1. It is preferred that thelower edge 6 of the back rest cushion be only slightly spaced above theupper surface of a cover 7 over the bed mattress 5, the spacing beingonly sufficient for the bed to be moved in and out from under the backrest cushion 4. In the illustrated structure, the bed portion 2 isadapted to be swung outwardly relative to the back rest in an are abouta vertical axis of a pivotal connection 8 between a stationary frame 9and the main bed frame It the pivotal connection 8 preferably beingspaced forwardly of the back rest cushion 4 a distance substantiallyequal to the spacing of said connection 8 from one end 11 of the mainframe whereby, when the bed portion is swung through an arc ofsubstantially degrees from the sofa position, the end 11 of the mainframe is adjacent the forward surface of the back rest cushion and saidcushion forms a head member for the bed. The stationary or back restframe 9 includes a connector member 13 forming a portion of the pivotalconnection 8 and fixed to said member 13 is a rearwardly extending bar14 extending beyond the rear portion 15 of the bed frame when in sofaposition, said bar 14 being connected to a longitudinally extending bar16 which extends toward the other end 17 of the bed frame and terminatesin spaced relation thereto in a forwardly extending bar 18 having a footmember 19 on the forward end thereof. At the ends of the longitudinalbar 16, there are also fittings 20 adapted to engage a floor or othersupport and cooperate with the member 19 and the connector member 13 inproviding suitable spaced supporting members for supporting thestationary frame. The stationary frame 9 has upstanding portions which,in the illustrated structure, are posts 21 extending upwardly from thefittings 20 and termimating in forwardly extending arms 22 providingmembers on which the back rest cushion 4 is fixed. Also carried on theposts 21, in the illustrated structure, is a cabinet or box structure 23located behind the back rest cushion 4 and adapted to be used forstorage of bed clothing and the like. The connections for the back rest4 and box 23 to the post 21 and arms 22 cooperate with the stationaryframe frame to form a rigid structure that tends to remain in selectedposition until intentionally moved.

The mainrbed frame 10 includes longitudinal rails 24 and 245 andtransverse end rails 26 and 27 and generally transverse members 28, 2,9,30 and 31, or other conventional bracing, as desired, to form a rigidstructure. The main bed frame 10 is preferably arranged with thelongitudinal rail 25 as the rearward rail positioned under the back restwhen in sofa position. The main bed frame is provided with rollers orcasters 32 and 33 preferably supported on legs 34 and 34 respectivelysecured to and depending from the transverse frame member 29 whereby therollers or casters engage the floor or floor covering to movably supportthe main frame adjacent the end 11 thereof. The other end portion of themain bed frame is movably supported on the floor or floor covering by awide band or belt 35 operatively engaged over spaced pulleys or rollers36 and 37 rotatably mounted on bearing members 38 secured in dependingrelation to the transverse members 3t} and 31. It is desired to swingthe bed frame in an arouate path whereby it moves substantially in aplane parallel to the floor about the vertical axis of the connector 8and, to facilitate such movement, the axes of the rollers 36 and 37 arein angular relation and converge whereby they intersect at the verticalaxis of the connector 3. The belt and roller supporting structure may bemotorized to drive the belt 35 with the roller and belt and driveassembly being constructed substantially as illustrated and described inthe Andes Patent No. 2,781,524 issued February 19, 1957. If it isdesired that the movement of the bed be manual, the motor may be omittedand, by applying force to the main bed frame remote from the pivotalconnection 8, the bed portion may be swung in an arc with the rollers 36and C17 and a belt thereon serving as the movable support havingsubstantial contacting area with the floor or floor covering, causinglittle, if any, wear on the fioor covering.

The pivotal connector 8 includes a member 39 secured to a frame member49 fixed on the transverse members 28 and 29 whereby the connectormember 39 depends therefrom and engages the upper surface of theconnector member 13. When the connector members 13 and 39 are pivotallyengaged, they provide a support for that portion of the main bed framewhereby the caster or roller 32 has slight clearance above the floorcovering, and the main bed frame is supported by the connector 8, caster33 and roller and belt assembly adjacent the other end of the bed framefor movement of the bed frame to and from sofa-making position.

The mattress portion of the bed is supported on the main frame fortilting movement whereby it is inclined downwardly from the forward sidetoward the back rest when in sofa position. In the illustratedstructure, the mattress is carried by an auxiliary frame 41 havingforward and rearward longitudinal rails 42 and 43 respectively andtransverse end rails 44 and 45, said auxiliary frame 41 being hingedlysupported on the main frame for up and down movement of the forward siderelative to said main frame. In the illustrated structure, the rearwardrails and 43 of the main frame and auxiliary frame respectively areconnected by hinge members 46 which consist of two hinge members spacedlongitudinally of said rail members, with the auxiliary frame spacedabove the main frame whereby the auxiliary frame will be level when inbed-forming position, the spacing accommodating portions 47 of raisingmembers at the forward side of the bed. In the illustrated structure,the forward rail 42 rests on raising portions or rollers 47 mounted onspaced arms 48 which are fixed on shafts 49 and 5t) spacedlongitudinally of the bed frame and extending transversely thereof, saidshafts 49 and 56 being rotatably mounted on the main frame for axialrotation. The shafts 49 and 50 each have depending arms 51 fixed thereonwith their lower ends connected by a rigid link 52 to simultaneouslyrotate the shafts 49 and 50' and swing the arms 48 thereon. The arms 48-are movable and, in the limit of movement in one direc tion, the rollers47 rest on the upper surface of the main bed frame rail 24 inbed-forming position. In sofaforming position, the arms 48 are swung upand slightly beyond an upright center position whereby the weight of themattress and/or person thereon tends to cause the arms to continue toswing in a counter-clockwise direction (FIG. 3), but such additionalmovement is limited as the position of the arms 51 and the link 52 issuch that continued counter-clockwise movement tends to raise the link52. toward the bed frame and, in the raised position of the auxiliaryframe, as illustrated in FIG. 3, the link 52 engages a stop member 53fixed on the transverse frame member 28 and depending therefrom. Thestop member 53 limits further movement of the link and anti-clockwiseswinging movement of the arms 48 from the position slightly past uprightas illustrated in FIG. 3.

The movement of the link 52 and the connected shafts 49 and 5t and arms48 could be performed manually, however, it is preferred that it beaccomplished automatically in response to swinging movement of the bed 2around the axis of the pivotal connection 8. An operating arm 54 has oneend 55 pivotally mounted on the main bed frame rail 25 for swingingmovement about a vertical axis of a mounting member 56, the operatingarm 54 normally extending substantially transversely of the main bedframe lti. The other end 57 of said operating arm is pivotally andslidably connected to the link 52. The end 57 of the arm 54 is pivotallyconnected by a suitable fastening device 58 to a slide member 59 carriedby the link 52 and, in the illustrated structure, the link 52 is tubularwith the slide member slidably mounted therein and the fastening device53 extending through a slot 6%) arranged longitudinally of said link 52.A resilient member such as a spring 61 is mounted in the link 52 withone end engaging an abutment 62 fixed to said link and the other endengaging a follower 63 positioned between the spring 61 and the slidemember 59. In normal position with the bed portion in bed position, thefastening device 58 of the arm 54 is positioned adjacent the end 64 ofthe slot at, and the spring 1 is under slight or no compression wherebythe weight of the mattress 5 and auxiliary frame will hold the mattressand auxiliary frame in its lowered position with the rollers 47 betweenand engaging the rails 24 and 42 of the main frame and auxiliary frame.

A counterbalance structure 65 is mounted on the link 52 with one portionengaging the main frame It) as, for example, the transverse member 29,to urge movement of the link and through its connections the arms 48 tomattress raising position. In the illustrated structure, thecounterbalance s5 is a substantially tubular housing 66 fixed by abracket 67 on the link 52 with a plunger 68 slidably mounted in saidhousing and having an end extending therefrom. A resilient member suchas a spring 69 is sleeved on the plunger with one end of the springengaging an end wall 761 of the housing and the other end of the springengaging an abutment 71 to urge the plunger from the end 72 of thehousing whereby the end 73 of said plunger engages the main bed frametransverse member 29 and the spring 69 in the counterbalance provides aforce slightly less than that required to lift the mattress andauxiliary frame to raise same to tilted position, so that in bedposition the mattress will remain horizontal but only a small force isrequired to lift same to tilt position for sofa-forming position.

The operating arm 54 has an abutment 74 preferably fixed thereto anddepending therefrom and adapted to engage a stop member 75 fixed on thestationary frame. In the illustrated structure, the stop member 75 is inthe form of a hook and is fixed on the stationary frame bar member 14,and the abutment member 74 extends downwardly from the operating arm 54in a position to engage the stop member during a portion of the swingingmovement of the bed to sofa position. The abutment 74 and stop 75preferably are arranged near the end of the operating arm 54 adjacentthe link 52 whereby when the bed extends from the back rest atapproximately 30 degrees included angle, the abutment will move over thenose 76 of the hook member 75 and the engagement thereof is such thatfurther movement of the abutment in response to pivotal movement of thebed to swing same to sofa position applies a force to the operating arms54, slide member 59 and through the spring 61 to the link 52, tending torotate the shafts 49 and 50 and swing the arms 48 upwardly in ananticlockwise direction (FIG. 3) to start to raise the forward portionof the auxiliary frame and mattress. If a person or other weight is onthe mattress during such movement, the spring 61 is compressed wherebythe bed portion can be moved into sofa position, but the weight orperson on the mattress overcoming the pressure of the spring 61 andspring 69 will retain the mattress in horizontal position. As soon asthe weight is removed, the spring 61 will move the link and apply forcemore than sufiicient to raise the mattress and auxiliary frame, swingingthe arms 48 upwardly to an upright position and then slightly past untilthe link 52 engages the stop 53 whereby the arms 48 retain the auxiliaryframe and mattress in tilted position to serve as a sofa. The hook shapeand engagement of the nose '76 thereof with the abutment 74- tends toretain the operating mechanism in mattress-raising position wherebychange of pressure of persons sitting and rising from the sofa will notalter the position of the operating mechanism, or move the link 52 fromengagement with the abutment 53. When it is desired to position thestructure for use as a bed, the end of the bed frame remote from thepivotal mounting 8 is grasped and force applied to swing same away fromthe back rest 5. As such swinging movement is started, the abutmentmember 74 is retained in engagement with the stop 75 providing relativemovement between the operating arm 54 and the main bed frame whichshifts the link 52; to rotate the shafts 49 and 5t and the arms 48thereon in a clockwise direction (FIG. 3) whereby the arms 48 move bycenter or upright position and continued swinging movement of the bedwill allow the auxiliary frame and mattress to be lowered to a levelposition when the bed frame is at approximately 30 degrees relative tothe back rest. Further swinging movement of the bed frame to increasedangular relationship with the back rest does not alter the horizontalposition of the auxiliary frame and mattress.

With the structure assembled and operated as illustrated and described,the mattress is tilted in sofa position in response to swinging movementof the bed frame, and, even though weight is applied to hold themattress in horizontal position as the bed is moved to sofa position,there is no damage to the operating structure and, when the weight isremoved, the operating structure, through the resilient forces appliedthereto, will automatically raise the mattress and the auxiliary framesupporting same to the inclined position and lock same whereby theweight of a number of persons sitting thereon will be adequatelysupported. Also, the bed may be moved to and from its various positionswith little or no wear to floor or floor covering over which itoperates.

It is to be understod that while I have illustrated and described oneform of my invention, it is not to be limited to the specific form orarrangement of parts herein described and shown except insofar as suchlimitations are included in the claims.

What I claim and desire to secure by Letters Patent is:

l. A combination sofa and bed comprising, a stationary frame adapted torest on a floor, a bed frame, means including a pivotal connection ofthe bed frame and stationary frame for supporting one end of said bedframe for pivotal movement about a vertical axis adjacent said one end,a mattress carried by said bed frame, a back rest in overlying relationto a portion of one side of said bed mattress when in sofa-formingposition, means movably supporting the other end of the bed frame forswinging movement about said vertical axis, an auxiliary frame hingedlymounted on the bed frame adjacent the back rest with the auxiliary frameoverlying the bed frame whereby the side of the auxiliary frame remotefrom the back rest is movable upwardly from a horizontal position ofsaid auxiliary frame to a position downwardly inclined fro-m said remoteside toward send back rest when in sofa-forming position, spaced armspivotally mounted on the bed frame adjacent the side remote from theback rest with portions of said arms extending along the bed frame whenin bed-forming position, means on said portions remote from the pivotalmountings of said arms for engaging said auxiliary frame wherebyswinging movement of said arms moving said portions upwardly andslightly beyond upright position raises the side of the auxiliary frameremote from the back rest, a rigid link connecting said arms forsimultaneous swinging movement thereof, a lever arm having one endportion pivotally mounted on the bed frame adjacent the back rest, meansconnecting the other end of said lever arm to said link, stop means onthe bed frame for limiting swinging movement of said arms insofa-forming position whereby weight of the mattress and auxiliary framecooperate with the stop means to normally retain the auxiliary frame ininclined position when in sofa-forming position, and cooperative meanson the lever arm and stationary frame engageable during a portion of themovement of the bed frame from bedforming position to sofa-formingposition for effecting relative movement of the lever arm and bed frameto move the link and swing said arms for raising and lowering saidauxiliary frame in response to swinging movement of the bed frame to andfrom sofa-forming position.

2. A combination sofa and bed comprising, a stationary frame adapted torest on a floor, a bed frame, means including a pivotal connection ofthe bed frame and stationary frame for supporting one end of said bedframe for pivotal movement about a vertical axis adjacent said one end,a mattress carried by said bed frame, a back rest in overlying relationto a portion of one side of said bed mattress when in sofa-formingposition, spaced elongate rollers under the bed frame adjacent the otherend thereof with the axes of said rollers converging at an acute angleto a point on said vertical axis, an endless flexible band extendingaround and operatively engaged with said spaced rollers, means rotatablymounting said spaced rollers on the bed frame whereby the lower run ofthe band engages the floor on which the bed is movable, the spacing ofthe rollers being such that the band thereon operates to maintain thebed frame in substantially level condition, an auxiliary frame hingedlymounted on the bed frame adjacent the back rest with the auxiliary frameoverlying the bed frame whereby the side of the auxiliary frame remotefrom the back rest is movable upwardly from a horizontal position ofsaid auxiliary frame to a position downwardly inclined from said remoteside toward said back rest when in sofa-forming position, spaced armspivotally mounted on the bed frame adjacent the side remote from theback rest with portions of said arms extending along the bed frame whenin bed-forming position, means on said portions remote from the pivotalmountings of said arms for engaging said auxiliary frame wherebyswinging movement of said arms moving said portions upwardly andslightly beyond upright position raises the side of the auxiliary frameremote from the back rest, a rigid link connecting said arms forsimultaneous swinging movement thereof, a lever arm having one endportion pivotally mounted on the bed frame, means slidably connectingthe other end of said lever arm to said link, resilient means operativebetween the said other end of said lever arm and said link biasing thelink toward auxiliary frame raising position, stop means on the bedframe for limiting swinging movement of said arms in sofa-formingposition whereby weight of the mattress and auxiliary frame cooperatewith the stop means to normally retain the auxiliary frame in inclinedposition when in sofa-forming position, and cooperative means on thelever arm and stationary frame engageable during a portion of themovement of the bed frame from bedforming position to sofa-formingposition for effecting relative movement of the lever arm and bed frameto move the link and swing said arms for raising and lowering saidauxiliary frame in response to swinging movement of the bed frame to andfrom sofa-forming position.

3. A combination sofa and bed comprising, a stationary frame adapted torest on a floor and having an upstanding portion, a bed frame, meansincluding a pivotal connection of the bed frame and stationary frame forsupporting one end of said bed frame for pivotal movement about averical axis adjacent said one end and spaced transversely of the bedfrom said upstanding portion when the bed is in one position to form asofa, a mattress carried by said bed frame, a back rest carried by saidupstanding portion and extending therefrom in overlying relation to aportion of one side of said bed mattress when in sofa-forming position,spaced elongate rollers under the bed frame adjacent the other endthereof with the axes of said rollers converging at an acute angle to apoint on said vertical axis, an endless flexible band extending aroundand operatively engaged with said spaced rollers, means rotatablymounting said spaced rollers on the bed frame whereby the lower run ofthe band engages the floor on which the bed is movable, the spacing ofthe rollers being such that the band thereon operates to maintain thebed frame in substantially level condition, an auxiliary frame hingedlymounted on the bed frame adjacent the back rest with the auxiliary frameoverlying the bed frame whereby the side of the auxiliary frame remotefrom the back rest is movable upwardly from a horizontal position ofsaid auxiliary frame to a position downwardly inclined from said remoteside toward said back rest when in sofa-forming position, spaced armspivotally mounted on the bed frame adjacent the side remote from theback rest with portions of said arms extending along the bed frame whenin bed-forming position, means on said portions remote from the pivotalmountings of said arms for engaging said auxiliary frame wherebyswinging movement of said arms moving said portions upwardly andslightly beyond upright position raises the side of the auxiliary frameremote from the back rest, a rigid link connecting said arms forsimultaneous swinging movement thereof, a lever arm having one endportion pivotally mounted on the bed frame adjacent the back rest, meansslidably connecting the other end of said lever arm to said link,resilient means operative between the said other end of said lever armand said link biasing the link toward auxiliary frame raising position,stop means on the bed frame for limiting swinging movement of said armsin sofa-forming position whereby weight of the mattress and auxiliaryframe cooperate with the stop means to normally retain the auxiliaryframe in inclined position when in sofa-forming position, resilientmeans between the bed frame and link biasing the link toward auxiliaryframe raising position applying a force to the link lesser than thatrequired for raising the auxiliary frame and mattress to reduce theforce necessary to raise said auxiliary frame, and cooperative means onthe lever arm and stationary frame engageable during a portion of themovement of the bed frame from bed-forming position to sofa-formingposition for effecting relative movement of the lever arm and bed frameto move the link and swing said arms for raising and lowering saidauxiliary frame in response to swinging movement of the bed frame to andfrom sofa-forming position.

4. A combination sofa and bed comprising, a stationary frame adapted torest on a floor, a bed frame, means including a pivotal connection ofthe bed frame and stationary frame for supporting one end of said bedframe for pivotal movement about a vertical axis adjacent said one end,a mattress carriedrby said bed frame, means t3 movably supporting theother end of the bed frame for swinging movement of the bed frame aboutsaid vertical axis, an auxiliary frame hingedly mounted on the bed frameadjacent one side and swingable up and down whereby the side remote fromsaid one side is movable upwardly from a horizontal position to aposition downwardly inclined toward said one side when in sofa-formingposition, spaced arms on said bed frame and operatively engaged withsaid auxiliary frame for effecting said up and down swinging movement ofthe auxiliary frame, a rigid link connecting said arms for simultaneousmovement thereof, a lever arm having one end portion pivotally mountedon the bed frame adjacent said one side, means connecting the other endof said lever arm to said link, stop means on the bed frame for limitingmovement of said arms in sofa-forming position whereby weight of themattres and auxiliary frame cooperate with the stop means to normallyretain the auxiliary frame in inclined position when in sofa-formingposition, and cooperative means on the lever arm and stationary frameengageable during a portion of the movement of the bed frame frombed-forming position to sofa-forming position for effecting relativemovement of the lever arm and bed frame to move the link and said armsfor raising and lowering said auxiliary frame in response to swingingmovement of the bed frame to and from sofa-forming position.

5. A combination sofa and bed comprising, a stationary frame adapted torest on a floor, a bed frame, means including a pivotal connection ofthe bed frame and stationary frame for supporting one end of said bedframe for pivotal movement about a vertical axis adjacent said one end,a mattress carried by said bed frame, means movably supporting the otherend of the bed frame for swinging movement of the bed frame about saidvertical axis, an auxiliary frame hingedly mounted on the bed frameadjacent one side and swingable up and down whereby the side remote fromsaid one side is movable upwardly from a horizontal position to aposition downwardly inclined toward said one side when in sofa-formingposition, spaced arms pivotally mounted on the bed frame adjacent thesaid side remote from said one side with portions of said arms extendingalong the bed frame when in bed-forming position, means on said portionsremote from the pivotal mounting of said arms for engaging saidauxiliary frame whereby swinging movement of said arms moves saidportions upwardly and slightly beyond upright position and raises theside of the auxiliary frame remote from said one side, a rigid linkconnecting said arms for simultaneous swinging movement thereof, a leverarm having one end portion pivotally mounted on the bed frame, meansslidably connecting the other end of said lever arm to said link,resilient means operative between the said other end of said lever armand said link biasing the link toward auxiliary frameraising position,and cooperative means on the lever arm and stationary frame engageableduring a portion of the movement of the bed frame from bed-formingposition to sofa-forming position for effecting relative movement of thelever arm and bed frame to move the link and swing said arms for raisingand lowering said auxiliary frame in response to swinging movement ofthe bed frame to and from sofa-forming position.

References (Zited in the file of this patent UNITED STATES PATENTS908,085 Freschl Dec. 29, 1908 2,134,135 Lefeure Oct. 25, 1938 2,691,174Harrison Oct. 12, 1954 2,781,524 Andes Feb. 19, 1957 2,937,383 RehfeldMay 24, 1960 2,955,297 Bailey Oct. 11, 1960

